>The fact that commercial airlines don't have many crashes is due to a completely vertical integrated system beyond just the analysis of crashes.

It has nothing to do with vertical integration (or you don’t know what that term means). There are several manufacturers of airplanes, several different manufactures of the engines for them, and hundreds of airlines all with their own business models, flight routes, personnel, financing models (old vs new planes), crew models (contract maintenance vs in-house for various parts), fleet models (unified 737 like southwest, potpourri like the other majors), regional offload (skywest), etc.

The only thing consistent about airlines is that they have to follow a strict set of regulations set by the FAA written in blood root caused by the NTSB.

If the government took your attitude of not caring about the cause because “it’s too hard” or “we don’t think it will be useful” (despite not knowing it), commercial aviation would be just as dangerous as general aviation and nobody in their right mind would fly frequently.